Draft for tractor-plows



M. F. HOFTRUP.

DRAFT FOR TRACTOR FLOWS.

APPLICATION FILED DEC. I6. 1920.

Patented Aug. 2, 1921 unluli alitozneg gwuentoz T 0 aZlwhom it mayconcern:

UNITED LSTA'ILES PATENT, OFFICE.

LOUIS nor'rnnr, or ELMIRA, NEW YORK DRAFT FOR TRACTOR-FLOWS.

Specification of Letters Patent.

Patented Aug. 2, 1921.

Application filedDecember 15, 1920. Serial No. 431,211.

residing at Elmira, in the county of Chemung and State of New York, haveinvented certain new and useful Improvements 1n Draftsfor'Tractor-Plows,'of which the following is a specification. I

The primary object of the invent1on is the provision of a draftconnection especially designed for tractor plows although serviceabl ewherever a plurality of members are to be pulled forwardly, thestructure providing flexibility and selfalinement of the drawn members.I A further object of theinvention is the provision of a draw point fortractor plows, permitting vertical and slight lateral adjustment of theplows during travel whereby two plows may be employedas a twoway plowfor side-hill work. I.

A still further object of the invent on 1s the provision of a flexibleself-alining draw point for two plows resulting n the automaticpositioning of the plow 1n cond1t1on for work upon the land over whichthe device travels regardless of the contour of the land such as thesloping position thereof.

Vith these generalobjects in view the invention consists in the novelcombination and arrangement of parts hereinafter more fully described inconnection with the accompanying drawing and in which like referencecharacters designate corresponding parts throughout the several views.

In the drawing Figure 1 is an elevational view of a plow beam providedwith my invention a portion of the beam and plow being illustrated bydotted lines,

Fig. 2 is a top plan view thereof,

3 is a horizontal sectional view of the same and c Fig. 1 is a verticaltransverse sectional view taken upon line IVIV of Fig. 1.

Referring more in detail to the drawing, my invention broadly consistsof draft connection 10 resiliently and pivotally carried between theforward extensions 11 of plow beams 12 whereby two plows 13 such asindicated by dotted lines in Fig. 1 of the drawing are forwardlypropelled by connecting up the draft connection 10 with suitabletraction means such as a tractor, not shown. A dished disk 13 is securedto the inner face of each extension 11 by bolts or-similar hold-fastdevices 1 1 with ribs 15 upon the outer faces of the disks 13 directlyengaging the inner faces of the extensions 11 thereby slightly spacingthe disks 13 therefrom. V

The draft connection 10 includes an annular or wheel-shaped body 16adapted for receiving the disks 13 within the opposite sides thereof incontact with the circular central web 17 of said body 16, with theannular edges 18 of the disks 13 engaging the oppo site faces of the web17 and with the heads 19 of the bolts 14 accommodated within the inner dshed sides of the disks 13 and spaced from the web 17 A journaling shaft20, here illustrated in the form of a bolt projects through a centralperforatlon 21 of the web 17, central perforations 22 of the disks 13and through corresponding perforations 23 in the extensions 11. Coilsprings 24 surround the shaft 20 outwardly of the extensions 11 beingseated upon the washers 25 carried by the shaft;;20 in contact with theextensions 11 and similar washers 26 upon the shaft 20 ad acent theopposite outer ends of the shaft. which ends are provided with a head 27and a threaded nut 28 respectively.

' An attaching plate 29 is carried by the body 16 with a plurality ofperforations 30 for the attachment of clevises, chains or other suitablmeans not shown, for attaching the same to a tractor or other powerdevice.

The complete operation of the invention will be fully understood fromthis detailed description thereof, the draft connection 10 being hauledforwardly drags the plows having the plow beams 12 and permits relativevertical shifting of the plows during forward travel. Slight lateraladjustment is also permitted the springs 24 serving to automaticallyreturn the beams 12 to their normal parallel positions. The connectingdevice is in this manner rendered flexible and connects the plow beamsfor self-alinement during operation, the upward and downward movementsof the plow having no efiect upon the firm attachment for draft purposesbetween the plow beams 12 and the draft connection 10.

A serviceable device is provided and while the form of the inventionherein set forth is believed preferable, it will be understood thatminor changes may be made therein without departing from the spirit andscope 7 of the invention as claimed.

What I claim as new and desire to secure by Letters Patent is r v 1. Adraft device for plow beams comprising disks adapted for rigidattachment to the beams,1a connectingmember having a circular bodywithin which the dlsks are normally positioned and resilient ournahng 7connections between said disks and body.

2. A draft device for plow beamscomprising disks rigidly secured to theinner 'faces of the beams, a wheel-shaped body with the disksnormallyseated within the opposite sides thereof and journaling connectionsbetween said disks and body.

3. A draft device for plow beams comprising disks rigidly secured to theinner faces of the beams, a wheel-shaped body with the disks normallyseatedwithin the opposlte sides thereof, ournalmg connections betweensaid disksand body, a journaling shaft centrallyprojecting through saiddisks and body and resilient means adjacent the outer ends of the shaftadapted for permitting slight lateral play between the beams duringoperation. 7

l. In combination with plow beams, forward extensions carried thereby,dished disks rigidly secured to said extensions slightly spaced inwardlythereof, a wheelshaped body having a central web and adapted foroverlying said disks when the ClGVlCElS assembled, and a ournalmg shaftaxially positioned throughsai'd web and shaped body having a central weband adapted for overlying said disks when the device is assembled, ajournaling shaft axially positioned through said web and disks and,projecting through said extensions-springs encircling the opposite endportions of the shaft tensioned between said extensions and the endportions ofithe shaft and an attaching plate carried by said body.

6. A device of the class described comprising plow beams, forwardextensions can ried thereby, dished disks having rib por- V tions upontheir outer faces engaging the inner faces of the extensions, boltssecured through said disks and extensions with the inner end portions ofthe bolts within the inner dished portions'of the disks, a wheelshaped,connecting body surrounding said disks with a' central web in normalcontact with the inner edges of the disks and journaling connectionsbetween the extenslons and body.

7. A device of the class described comprising plow beams, forwardextensions carried thereby, dished disks having rib portions upon theirouter faces engaging the inner faces of the extensions, bolts securedthrough said disks and extensions with the 1nner end portions of thebolts within the inner dished portions of the disks, a wheelshapedconnecting body surrounding said disks with a central web in normalcontact with the inner edges of the disks, the disks and web havingcentral perforations and the extensionshaving perforations in alinementtherewith when the device is assembled, a

journaling shaft through said perforations and resilient,- membersengaging between the outerfaces of the extensions and the oppo-r siteend portions of the shaft. 7

In testimony whereof I afiix my signature. LOUIS M. HOFTRUP,

